Abstract

Optoelectronic properties of single CdSnanobelts are investigated by performing transport measurements with different laser ON/OFF circles. The current increases linearly with the bias voltage in the dark, and superlinearly under illumination. The superlinear increase can be related to the enhanced mobility due to the partial release of surface adsorbates under illumination. The current jumps up by five orders of magnitude upon turning on the laser with an intensity of within and decreases by five orders just after turning off the laser. The high sensitivity and fast response in the visible range indicate potential applications of CdSnanobelts in realizing optoelectronic switches.

Received 13 July 2004Accepted 16 March 2005Published online 04 May 2005

Acknowledgments:

The authors acknowledge the support from the Key Project of the Chinese Academy of Sciences (KGCX2–SW-602–2), the Special Funds for Major State Basic Research Project No. G2001CB3095 of China, and also from the National Natural Science Foundation of China through Grant Nos. 69925410 and 60236010.